Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 38 for “"Small Angle Neutron Scattering (SANS)"”.
-
Formation, structure, and reproducibility of cerato-ulmin hydrophobin-coated bubbles
… were investigated. For the submicron bubbles, small-angle x-ray scattering (SAXS) and small-angle neutron scattering (SANS) show the bubbles are cylindrical with a ~70 nm cross-sectional diameter and film thickness of 15 nm, the equivalent of 5 CU proteins. Atomic force microscopy (AFM) of …
-
The design, synthesis and properties of pressure-processable biodegradable block copolymers
… miscibility of several block copolymer systems. Small-angle neutron scattering (SANS) experiments confirmed that amorphous forms of the poly([epsilon]-caprolactone-ran-5 ethylene ketal [epsilon]-caprolactone)-block-poly(lactic acid) (PmCL-b-PLA) system exhibit pressure- induced miscibility, and …
-
Studies of liquid-liquid phase transition and critical phenomena in supercooled confined water by neutron scattering
Small angle neutron scattering (SANS) is used to measure the density of water contained in 1-D cylindrical pores of a mesoporous silica material MCM-41-S. By being able to suppress the homogenous nucleation process inside the narrow pore, one can keep water in the liquid state down to at least 160 …
-
Solution structure and biochemistry of an intramembrane aspartyl protease (IAP)
… to control the substrate specificity of mIAP. Small-angle neutron scattering (SANS) study showed that mIAP is a compact monomer in solution. Future direction of study on expanding substrate repertoire, evaluating effects of Alzheimer disease mutations, and structural characterization of …
-
Microfluidics enhanced synthesis of micellar nanostructures
… In equilibrium, micelles can transition from entangled to branched structures with increasing ionic strength and temperature. Under flow conditions, micellar structure transition can follow different trajectories. In the present work, the structural and rheological evolution of both ionic and …
-
Studies of structure and dynamics of biological macro-molecular assemblies by low angle neutron diffraction and inelastic X-ray scattering
… Na-DNA molecules with the inelastic X-ray scattering (IXS). In the second part, we have developed a new efficient method to calculate the inter-particle structure factor in a simple fluid interacting with a two-Yukawa term potential and apply it to study the kinetic phase diagram and …
-
Small angle scattering characterisation of micellar systems and templated architectures
… CO2 and selected hydrocarbon environments. Using small angle neutron scattering (SANS) techniques the spacing between liquid crystal micelles was measured in-situ. The liquid crystals studied were templated from different surfactants with varying structural characteristics. Micelles of a dilute …
-
The synthesis, characterization and catalytic applications of mesocellular silica foams
… understanding of their templating behavior. Small-angle neutron scattering (SANS) in conjunction with a thermodynamic model for swollen micelle formation were used to determine the size, shape and internal structure of the Pluronic micelles. Knowledge of the micelle structure and aggregation …
-
Modelle für die Kleinwinkel-Streuung und Anwendungen
… to the structure investigation on the basis of small-angle neutron scattering (SANS). A new analytical scattering function for polydispers precipitates with diffusion zones is presented and used in SANS experiments. For diluted and dense packed systems structure describing parameter values were …
-
Co-polymer microgels: contemporary physico-chemical, structural and analytical investigations
… by turbidimetric analysis, dynamic light scattering, electrophoretic mobility measurements and TEM to determine particle size and volume phase transition (VPT) behaviour. The incorporation of BuAc has been found to reduce the volume phase transition temperature (VPPT) of poly(NIPAM). …
-
A SANS study of the interfacial curvatures and the phase behavior in bicontinuous microemulsions
… mean, and square mean curvatures. A new small-angle neutron scattering (SANS) data analysis method to extract the interfacial curvatures was developed and applied to various microemulsions. The method involves the use of a clipped random wave model with an inverse 8th order polynomial …
-
Solution Properties of Polymer Nanostructures Studied by Scattering Techniques
… systems mainly studied by using the scattering techniques at the solution state . The importance of the studying the solution properties of the polymer systems can be related to the solution related applications. In this context the solution properties of the flexible cylindrical …
-
Structural and spectroscopic studies on the porin-cytochrome complex from Shewanella oneidensis MR-1
… using" analytical" ultracentrifugation" (AUC)," small" angle" X!ray" scattering" (SAXS)" and" spectropotentiometric" techniques." MtrA" and" a" truncated"N!terminal" MtrA" construct"containing" the" five"N!terminal"hemes"(MtrA"N)"were"both"observed" to"be"prolate" and"highly"extended" along"one" …
-
LEVERAGING CONFINEMENT AND SURFACE EFFECTS TO CONTROL POLYMER PHASE BEHAVIOR AND TRANSPORT PHENOMENA IN POLYMER-INFILTRATED NANOPARTICLE FILMS
… ellipsometry, scanning electron microscopy, small-angle neutron scattering (SANS), and resonant soft X-ray scattering (RSoXS), we examine how blend morphology deviates under nanoconfinement. To probe solvent resistance, we employ solvation experiments to track polymer removal and determine …
-
The interaction of antimicrobial peptides with lipopolysaccharide aggregates and model membranes.
… activities and were therefore studied using small-angle neutron scattering (SANS) and cryo transmission electron microscopy (cryo-TEM) to assess any modication induced to the colloidal structure of LPS, ideally from a high toxic state to a lower toxic morphology of the aggregates. The …
-
A Study of the Kinetics of Phase Separation in a Nickel-12.5 at.percent Silicon Alloy
… has been studied by means of in situ wide-angle x-ray diffraction (XRD), small-angle neutron scattering (SANS) and high-resolution wide-angle XRD techniques. The kinetic parameters, i.e. rate constants, governing the growth of the particle size and the volume fraction of the …
-
Harnessing Light-Responsive Structural Control in Surfactant Assemblies
… a method for in-situ light irradiation during small-angle X-ray scattering (SAXS) experiments is developed. This system is then used to determine the real-time structural effects induced by light and X-rays on PS assemblies. Finally, SAXS with in-situ light irradiation is combined with …
-
Implications of Nanofiber Length and Polydispersity on Flow Alignment
… distributions in flowing suspensions with small-angle neutron scattering (SANS). Hen egg-white lysozyme (HEWL) PNFs with controlled aspect ratios and polydispersities were prepared by sonication and dialysis, allowing for systematic evaluation of flow behavior. Dynamic light scattering …
-
Controlling molecular interactions to define interfacial phenomena and structure
… thesis, the interactions between polymers and small molecules were probed in various states: solution, gel and foam. The main techniques used were tensiometry, diffusion NMR and small-angle neutron scattering (SANS). The experiments involved investigating the competitive interactions between …
-
Synthesis and Blend Behaviour of Multi-End Capped Polyethylene
… namely ion beam analysis (IBA), contact angle measurements and several neutron scattering measurements, including neutron reflectivity (NR), small angle neutron scattering (SANS) and quasi-elastic neutron scattering (QENS) and studies proved surface enrichment with fluoro-chain ends. This …
Page 1 of 2